First time downloading theme. Seek advice

Hi, I am working on public computer. Should I download newly brought theme on this computer and upload to my server or should I wait to work on my personal computer. Any disadvantage? Please advice.
Thanks

I had an impression that i can download only once, i have just purchased one theme mayashop. it say “Your use of the Work is limited to a single applicationis for single use”.
please advice, can I download again if needed.